Golf course superintendents prepare for Zoysia Patch & Large Patch outbreaks
Trinity™ fungicide continues to get more exposure in the zoysia patch segment. Every golf course superintendent I’ve spoken with after using Trinity has been very pleased with the results. Fall and spring applications at 1-2 oz. are the standard recommendation here in the Ohio Valley. Some will go with 2 oz. in the fall then 1 oz. in the spring; a few might go 2 and 2, and some are going down with 1 and 1.

Trinity™ fungicide controls Large Patch in warm season turf on golf courses
Trinity on Large Patch (a.k.a Brown Patch) in Seashore Paspalum (and other warm season turfgrasses such as St. Augustinegrass, centipedgrass or bermudagrass)

As the change in warm summer nights begin to occur and lower night temperatures combine with cooling of the soil, the potential for activity of Rhizoctonia solani (AG 2,2) can be triggered for disease development. The entire south to southeast across the lower transition zone has prime conditions with temperatures and potential for wet conditions due to tropical storms.

Large Patch/ Brown Patch outbreak on turf.

Prevention of Zoysia Patch & Large Patch/ Brown Patch on turf is essential
Most turf managers know that getting behind in the control of zoysia patch/large patch can cost you with development of large patches that continue to green-up in the spring when loss of turf will become very apparent.

For the past two years Trinity has been trialed for control of the warm season turfgrass brown patch. When symptoms are fully developed and patches are expansive it is harder to control than if you use well-timed preventative applications this fall. The most effective use of fungicides has been noted as the fall applications.

Fall Application Recommendations

Make 1 to 2 applications of Trinity fungicide 30-days apart beginning in September and before the first frost date. It is important that the spray has good coverage, particularly for control of basal sheath rot and crown rot.

Trinity at 1 to 2 ounces per 1,000 square feet in a 1 gallon spray volume will result in good control. Use a flat fan nozzle and deliver Trinity to the crown for complete coverage.

If you don’t want to make two fall applications then make one fall treatment followed by one spring application (if you’re in the transition zone, then apply Trinity as the turf emerges from dormancy). Spring only applications do not provide good curative control.

Turfgrasses under higher nitrogen programs and lower mowing heights may be most susceptible as you go towards prime environmental conditions for Zoysia Patch/Large Patch development.

Protect your turfgrass now in the next couple of weeks as the disease becomes active.